The automaker also said that it would spend a consolidated 890 billion yen on environmental technology development in the fiscal year ending March 2014

It's a good day for Toyota and electric vehicles (EVs) in general as the Prius has managed to hit 3 million sales total.

Toyota announced that its full hybrid electric Prius passed the 3 million worldwide cumulative sales mark at the end of June. The automaker also said that it would spend a consolidated 890 billion yen on environmental technology development in the fiscal year ending March 2014.

It also plans to make consolidated capital expenditure investments of 910 billion yen, with about 440 billion yen invested in Japan. That's a 7 percent and 9 percent increase respectively year-on-year.

The Prius first went on sale in Japan in 1997 and the U.S. in 2000. The current Toyota Prius received an EPA-rated 51 MPG city/49 MPG highway, which is a 22 percent boost from the last generation.

Last November, reports started circulating that Toyota was readying the fourth generation Prius -- and that it would achieve 60 MPH.

Toyota is also working to make sure that it stays on top of the green car game. Back in May of this year, it announced that it would build a new production line for about 20 billion yen ($194 million USD) in an effort to increase lithium-ion battery production to 200,000 per year.

At that time, Reuters reported that Toyota's Prius line accounted for 70 percent of the 5 million gasoline-electric hybrid vehicles the company has sold since they launched in 1997.

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